TetraSpar Demonstrator
Floating-foundation demonstrator at METCentre, Karmoy.
Status
Operationallifecycle stage
Ownership
Location
NorwayNorth Sea
Technology
Capacity
3.6 MW ◇
Turbines
1 × 3.6 MW ◇
Foundation
Floating ◇
Site & conditions
Site rights
Exploration right Concession · Olje- og energidepartementet (Norwegian Ministry of Petroleum and Energy) · 2013-09 ◆
Distance from shore
10 km ◇
Wind speed
9.6 m/s @ 100 m ≈
Revenue & grid
Offtake
—
Grid
—
Schedule
FID
13 Feb 2019 ◆
COD
2021 ◇
Project timeline verified milestones only — each date carries its provenance mark
Dashed tick marks today (13 Oct 2026).
Revenue & offtake the regime the project was built under
Offtake regime not on record
A built project sells its power under the contract or support regime it was financed with; it is not expected to bid into new government offtake rounds. Where the record does not yet name that regime, the row says so rather than guessing.
Installation how the build is going · from sourced statements and Hafrok’s registers
Installation complete
Installation · on record
StageOperational
In operation since2021
Offshore construction2021-06 → 2021
Sources & verification
Rests on 12 sources (6 primary) · ◆ 7 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Operator6
[7]
Stiesdal Offshore2026-03-27◆ TetraSpar Demonstrator to be decommissio…
“TetraSpar Demonstrator ApS, a project company owned by Stiesdal Offshore, RWE and TEPCO Renewable Power, today announced the planned decommissioning of the floating TetraSpar Demonstrator ... The oper…”
supportsStatus note
[9]
innogy SE / Shell / Stiesdal Offshore Technologies (joint press release, hosted by Stiesdal)2019-02-13◆ Shell, innogy and Stiesdal Offshore Tech…
“Essen, 13 February 2019 innogy SE, Shell and Stiesdal Offshore Technologies A/S (SOT) are bringing floating wind to the next level: The partners have taken the final investment decision on the ‘TetraS…”
supportsFinal investment decision
[10]
TetraSpar Demonstrator partners Shell, TEPCO RP, RWE, Stiesdal (joint press statement, hosted by Stiesdal)2021-12-01◆ TetraSpar Demonstrator, the world's firs…
“The floating wind foundation TetraSpar Demonstrator owned by Shell, TEPCO RP, RWE and Stiesdal has been successfully connected to Norway’s grid • The floating foundation was towed from Denmark to Norw…”
supportsFirst power
[11]
Bourbon (installation contractor)2021-08-27◆ Bourbon Subsea Services successfully ins…
“After mooring lines installation in June, towing and hook up in July, Bourbon Subsea Services completed the offshore installation of the 3,6 MW TetraSpar Demonstrator Floating Wind Turbine at Metcentr…”
supportsOffshore construction
[12]
Energidepartementet (Norwegian Ministry of Energy), via NVE case 2011012852026-01-20◆ Vedtak - Norwegian Offshore Wind AS - Sø…
“Marin Energi Testsenter AS fikk den 10. september 2013 konsesjon etter havenergilova § 3-1 fra Olje- og energidepartementet (nå Energidepartementet) til å bygge og drive et test- og demonstrasjonsanle…”
supportsSite rights
[13]
Norges vassdrags- og energidirektorat (NVE), case 2011012852022-09-20◆ Bakgrunn for vedtak - Marin Energi Tests…
“Den 01.10.2020 kom det inn forslag til detaljplan for installasjon av demonstrasjonsturbinen Tetraspar. Detaljplanen ble godkjent av NVE den 03.06.2021, og Tetraspar ble ankret opp på testfeltet utenf…”
supportsConsentConsent appliedConsent granted
Trade press6
[1]
offshoreWIND.biz2021
Press report — cited, not quoted; read it at the source link.
supportsCommercial operationTotal capacity
[2]
offshoreWIND.biz2021
Press report — cited, not quoted; read it at the source link.
supportsTurbinesUnit capacityFoundationDistance from shore
[3]
[4]
offshoreWIND.biz2026-03-27
Press report — cited, not quoted; read it at the source link.
supportsowner
[6]
[8]
offshoreWIND.biz2026-09-08◆ TetraSpar Floater Completes Five-Year Te…
Press report — cited, not quoted; read it at the source link.
supportsStatus note